Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66ae35438fc0f85…

MALICIOUS

PDF

66.8 KB Created: 2021-02-08 20:41:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0fa4f15d3969e01cc43af31294d8e232 SHA-1: ce29c5e76d64bb70ddc9ffcb4f7ffbc6dea63d88 SHA-256: f66ae35438fc0f85e8a9d2be4a489e9f1911ae0b42eff3354c0d6cf982316e3d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://druttle.ru/wb?keyword=animations%20in%20powerpoint PDF link annotation
    • https://tobadagagu.weebly.com/uploads/1/3/4/7/134750152/norapurimug-difedoserofox-fogeten.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427293/normal_601dc87eb2097.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/hgfhege/xekudig.pdfIn PDF document text
    • https://lelusujizuzu.weebly.com/uploads/1/3/1/4/131438438/lovodikizilis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452217/normal_6009f8d6cb661.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/dQIsggN/mixizufawu.pdfIn PDF document text
    • https://xomuwesakutizid.weebly.com/uploads/1/3/5/3/135393414/effaf.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/u3KrFjg/vinamexujinivejilirej.pdfIn PDF document text
    • https://wagemerefav.weebly.com/uploads/1/3/2/7/132712282/8748502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_601bb2a77bcfe.pdfIn PDF document text
    • https://dowamodugepaxa.weebly.com/uploads/1/3/0/7/130739159/41b7ec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/gizesafufimonanut.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/23841148431.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/free_android_emulator_nox_app_player.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/cafissimo_pure_manual.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA9 5016 bytes
SHA-256: dac5d0c4b2fa05ca2bcaf6e2c92a23cdb0929aec7cce0464599f5cc634068da8
font_01_sfnt_off0000dcac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAC 9848 bytes
SHA-256: fb3cd031205adcde49de2472c87c926f8c3f3d8cfcb7b9db320de5185082e170